op {
  name: "TensorListPushBack"
  input_arg {
    name: "input_handle"
    type: DT_VARIANT
  }
  input_arg {
    name: "tensor"
    type_attr: "element_dtype"
  }
  output_arg {
    name: "output_handle"
    type: DT_VARIANT
  }
  attr {
    name: "element_dtype"
    type: "type"
  }
}
